package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.time.LocalDateTime;

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {
    @Autowired
    private EmployeeService employeeService;

    /**
     * 员工登录
     *
     * @param request
     * @param employee
     * @return
     */
    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee) {

        //1、将页面提交的密码password进行md5加密处理
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        //2、根据页面提交的用户名username查询数据库
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Employee::getUsername, employee.getUsername());
        Employee emp = employeeService.getOne(queryWrapper);

        //3、如果没有查询到则返回登录失败结果
        if (emp == null) {
            return R.error("登录失败");
        }

        //4、密码比对，如果不一致则返回登录失败结果
        if (!emp.getPassword().equals(password)) {
            return R.error("登录失败");
        }

        //5、查看员工状态，如果为已禁用状态，则返回员工已禁用结果
        if (emp.getStatus() == 0) {
            return R.error("账号已禁用");
        }

        //6、登录成功，将员工id存入Session并返回登录成功结果
        request.getSession().setAttribute("employee", emp.getId());
        return R.success(emp);
    }


    @PostMapping("/logout")
    public R logout(HttpSession session){
        Long empId = (Long) session.getAttribute("employee");
        log.info("后台系统员工退出，员工id为: {}",empId);

        session.invalidate();

        return R.success(null);
    }

    /**
     * 新增员工
     * @param employee
     * @return
     */
    @PostMapping
    public R<String> save(HttpServletRequest request, @RequestBody Employee employee) {
        log.info("新增员工，员工信息: {}",employee.toString());

        // 1.设置初始化密码123456，需要进行MD5加密处理
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));

        // 2.设置员工参加时间
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());

        // 3.获取当前登录用户的id，即管理者的账号，记录管理者的操作
//        Long empId = (Long) request.getSession().getAttribute("employee");
//
        // 4.设置员工的创建者信息
//        employee.setCreateUser(empId);
//        employee.setUpdateUser(empId);

        // 5.保存用户
        employeeService.save(employee);
        return R.success("新增员工成功");
    }

    /**
     * 员工信息分页查询
     * @param page 当前查询页码
     * @param pageSize 每页展示记录数
     * @param name 员工姓名 - 可选参数
     * @return 返回分页查询信息
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {
        log.info("page = {},pageSize = {},name = {}" ,page,pageSize,name);

        // 1.创建分页构造器，进行分页
        Page pageInfo = new Page(page, pageSize);

        // 2.设置分页条件构造器
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();

        // 3.添加过滤条件
        queryWrapper.like(StringUtils.hasLength(name), Employee::getName, name);

        // 4.添加排序条件
        queryWrapper.orderByDesc(Employee::getUpdateTime);

        // 5.进行分页查询
        employeeService.page(pageInfo, queryWrapper);

        return R.success(pageInfo);
    }

    /**
     * 根据id修改员工信息
     * @param employee ajax发送 过来id、status
     * @return 返回更新信息
     */
    @PutMapping
    R<String> update(HttpServletRequest request, @RequestBody Employee employee) {
        long id = Thread.currentThread().getId();
//        log.info("线程id为：{}",id);
//        log.info("线程BaseContext.getCurrentId为：{}", BaseContext.getCurrentId());

        log.info(employee.toString());
        // 1.从request域中获取当前操作人员（管理员）id
//        Long empId = (Long) request.getSession().getAttribute("employee");
       // 2.设置员工信息
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(empId);

        // 3.更新员工信息
        employeeService.updateById(employee);

        return R.success("员工信息修改成功");
    }

    /**
     * 根据id查询员工信息
     * @param id 路径id
     * @return 查询信息
     */
    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id) {
        log.info("根据 id 查询员工信息...");
        // 1.根据id查询用户
        Employee employee = employeeService.getById(id);

        // 2.查询到用户后，返回用户信息
        if (employee != null) {
            return R.success(employee);
        }
        return  R.error("没有查询到对应员工信息");
    }

    // 更新一行代码
}
